Digital Commons Network^™

Assessing The Live Bait Industry And The Ecological Status Of Invasive Cyprinodontiformes (Sheepshead Minnow: Cyprinodon Variegatus And Gulf Killifish: Fundulus Grandis) In Texas Streams, Erin Shepta

Electronic Theses and Dissertations

The introduction of invasive species is one of the greatest threats to global biodiversity. Once established, invasive species often cause irreversible ecological damage on native communities. Here, I investigated the pathway of introduction and ecological impacts of the sheepshead minnow (C. variegatus) and the gulf killifish (F. grandis). Both species were thought to have been introduced into inland Texas waters via bait-bucket releases and have caused native populations of their inland congeners to decline. While I did not find evidence that either species were being sold in inland shops, bait industry experts did reveal other potentially …

An Application Of Differential Mathematical Modeling Techniques To Study The Ongoing Rabies Epizootic In China, Christopher Turner

Electronic Theses and Dissertations

Rabies remains a global public health issue with a wide variety of neurological symptoms such as confusion, slight paralysis, hypersalivation, and hydrophobia. Rabies is usually fatal once symptoms appear. Many species are reservoirs for rabies, such as foxes, racoons, and wild dogs, which in turn can transmit the disease to humans, leading to complex transmission chains. There is a long latent period of rabies, between 1 to 3 months after infection, which further complicates control efforts. Mathematical modeling is a valuable tool in the study of infectious disease outbreaks and there have been many models applied to rabies outbreaks. However, …

Modeling And Debiasing Feedback Loops In Collaborative Filtering Recommender Systems., Sami Khenissi

Electronic Theses and Dissertations

Artificial Intelligence (AI)-driven recommender systems have been gaining increasing ubiquity and influence in our daily lives, especially during time spent online on the World Wide Web or smart devices. The influence of recommender systems on who and what we can find and discover, our choices, and our behavior, has thus never been more concrete. AI can now predict and anticipate, with varying degrees of accuracy, the news article we will read, the music we will listen to, the movies we will watch, the transactions we will make, the restaurants we will eat in, the online courses we will be interested …

Western Christianity And The Origins Of Antiblackness, Eurocentrism, And White Supremacist Ideology., John Chenault

Electronic Theses and Dissertations

This qualitative study investigates the cult(ural) and intellectual history of Western Christianity to address a significant gap in the literature pertaining to the origins of whiteness/antiblackness in the West and its subsequent socialization worldwide. Western Christianity’s seminal role in the social construction of the whiteness/antiblackness dichotomy has been undertheorized, neglected, and ignored. This study finds early Christian theologians categorically imposed conceptual metaphors about Blackness on African people that depicted them as the exemplars of evil to teach Christian doctrine about sin and salvation. It connects these original antiblack discourses directly to the theo-political arguments Western European Christians used centuries later …

Beyond Accuracy In Machine Learning., Aneseh Alvanpour

Electronic Theses and Dissertations

Machine Learning (ML) algorithms are widely used in our daily lives. The need to increase the accuracy of ML models has led to building increasingly powerful and complex algorithms known as black-box models which do not provide any explanations about the reasons behind their output. On the other hand, there are white-box ML models which are inherently interpretable while having lower accuracy compared to black-box models. To have a productive and practical algorithmic decision system, precise predictions may not be sufficient. The system may need to have transparency and be able to provide explanations, especially in applications with safety-critical contexts …

Machine Learning Approaches For Early Prediction Of Hypertension., Heba Elsayed Mohamed Kandil

Electronic Theses and Dissertations

Hypertension afflicts one in every three adults and is a leading cause of mortality in 516, 955 patients in USA. The chronic elevation of cerebral perfusion pressure (CPP) changes the cerebrovasculature of the brain and disrupts its vasoregulation mechanisms. Reported correlations between changes in smaller cerebrovascular vessels and hypertension may be used to diagnose hypertension in its early stages, 10-15 years before the appearance of symptoms such as cognitive impairment and memory loss. Specifically, recent studies hypothesized that changes in the cerebrovasculature and CPP precede the systemic elevation of blood pressure. Currently, sphygmomanometers are used to measure repeated brachial artery …

Hybrid Machine And Deep Learning-Based Cyberattack Detection And Classification In Smart Grid Networks, Adedayo Aribisala

Electronic Theses and Dissertations

Power grids have rapidly evolved into Smart grids and are heavily dependent on Supervisory Control and Data Acquisition (SCADA) systems for monitoring and control. However, this evolution increases the susceptibility of the remote (VMs, VPNs) and physical interfaces (sensors, PMUs LAN, WAN, sub-stations power lines, and smart meters) to sophisticated cyberattacks. The continuous supply of power is critical to power generation plants, power grids, industrial grids, and nuclear grids; the halt to global power could have a devastating effect on the economy's critical infrastructures and human life.

Machine Learning and Deep Learning-based cyberattack detection modeling have yielded promising results when …

Nurses Leading In Bridging The Culture Gap: Communicating With The Deaf Community, Veronica C. Leftridge

Electronic Theses and Dissertations

Nurses provide patient care in clinics, hospitals, homes, churches, schools, communities, and military, as well as on emergency medical helicopters. When a nurse is assigned to care for a patient, the patient expects the nurse to be culturally competent, communicate effectively, and provide safe quality care. However, cultural incompetence is observed when nurses provide care for Deaf patients, but they are unfamiliar with Deaf culture. In addition, communication is a fundamental skill nurses learn in nursing school, but course content in nursing programs rarely touches on how to communicate effectively with Deaf patients. Of the approximately 325 million people in …

Examining Diversity And The Role And Influence Of Post-Secondary Faculty At A Predominantly White Institution In Tennessee: A Critical Race Case Analysis, Lanell Smith

Electronic Theses and Dissertations

The purpose of this qualitative, critical race analysis study is to explore how White faculty conceptualize and apply critical race theory (CRT) and culturally responsive pedagogy (CRP) to curricula within a college of education and how the perceptions of their students’ identities influence specific pedagogical decisions. The researcher sought to extend the research on CRT in education by analyzing specific, detailed cases and incorporating purposeful sampling by selecting participants who match specific study criteria, i.e. graduate-level White faculty located in Tennessee who teach in programs of education.

This study was limited to six faculty in a college of education (in …

Student Experiences Leaving Health Profession Interest Areas, Megan Roberts

Electronic Theses and Dissertations

The undergraduate major change or declaration process can be cumbersome for students who find themselves in unknown territories when making decisions or seeking help during this transition. One of the most challenging groups of students to assist through this transition are those who are denied access to their intended program of study. These students are often pursuing selective degree programs with limited enrollment and competitive admission requirements. Research on students pursuing selective degree programs is largely outdated, with most studies being older than ten years. The purpose of this qualitative study was to explore how undergraduate students experience leaving selective …

A Machine Learning Approach For Reconnaissance Detection To Enhance Network Security, Rachel Bakaletz

Electronic Theses and Dissertations

Before cyber-crime can happen, attackers must research the targeted organization to collect vital information about the target and pave the way for the subsequent attack phases. This cyber-attack phase is called reconnaissance or enumeration. This malicious phase allows attackers to discover information about a target to be leveraged and used in an exploit. Information such as the version of the operating system and installed applications, open ports can be detected using various tools during the reconnaissance phase. By knowing such information cyber attackers can exploit vulnerabilities that are often unique to a specific version.

In this work, we develop an …

John Horton Conway: The Man And His Knot Theory, Dillon Ketron

Electronic Theses and Dissertations

John Horton Conway was a British mathematician in the twentieth century. He made notable achievements in fields such as algebra, number theory, and knot theory. He was a renowned professor at Cambridge University and later Princeton. His contributions to algebra include his discovery of the Conway group, a group in twenty-four dimensions, and the Conway Constellation. He contributed to number theory with his development of the surreal numbers. His Game of Life earned him long-lasting fame. He contributed to knot theory with his developments of the Conway polynomial, Conway sphere, and Conway notation.

Posthumanism In The Early Modern Period: Jonson, Marlowe, And Shakespeare, Kayli Compton

Electronic Theses and Dissertations

This thesis examines the existence of posthumanism in the dramas of Ben Jonson, Christopher Marlowe, and William Shakespeare – the three most prominent playwrights of the early modern period. Posthumanist theory, which gives scholars the opportunity to look at past works in a new and unique way, attempts to re-locate the human in the diverse creatures and objects in the world we inhabit. By applying posthumanist theory to older works, we can better understand the early modern period and its writers as well as their relevance to the present. Their plays’ messages serve as warnings that work to guide humanity …

Accepting Or Opposing The Status Quo: A Look At The Women Characters In Mariama Bâ’S So Long A Letter (1981) And Chimamanda Adichie’S Purple Hibiscus (2003), Omolola Giwa

Electronic Theses and Dissertations

What exactly is the status quo of women in Africa? Women’s selfhood has been systematically subordinated or outright denied by law, customary practices, and cultural stereotypes. Scholars like Judith Bennet suggest that religious practices and colonial rule subjugate African women. Patriarchal ideologies guide the society’s discrimination against women and this has influenced the status of women, especially married women and the way they respond in times of affliction.

Authors like Chimamanda Adichie and Mariama Ba in their fictional novels The Purple Hibiscus and So Long a Letter focus on capturing the struggles and conditions of women in the Western African …

Operatic Mysticisms: Mountains, Deserts, Waterscapes, Andrew Demczuk

Electronic Theses and Dissertations

Operatic Mysticisms: Mountains, Deserts, Waterscapes examines the ways we encounter environments as readers/viewers of operas, literature, film, and sound recordings, and how each medium requires different detail-gathering techniques. Respective to the previously mentioned mediums, Sun & Sea (2017), Mount Analogue (1952), El Mar La Mar (2017), and Energy Field (2010) are analyzed by engaging with environmental media studies and invention. Reflecting the nature of each landscape—summits of mountains, aporias of deserts, and mysteries of waterscapes—an elemental approach is taken in investigating how these spaces may be noticed, internalized, recorded, and traversed by both the artist and viewer. …

Gen Z Students’ Experiences With College Choice, Heather Levesque

Electronic Theses and Dissertations

The purpose of this qualitative study was to explore what influences Gen Z student college choice. Research on college choice has provided insight into whether or not a student will attend college; however, limited research exists on what impacts Gen Z students’ college choice and how marketing and communication influence what college a student will choose. College recruitment has always been challenging, given the high competition between colleges and universities. With the decrease in enrollment over the last decade and the unexpected impact of COVID-19, that challenge continues to grow. Enrollment and marketing administrators have difficulty expanding and diversifying their …

Finding A Representative Distribution For The Tail Index Alpha, Α, For Stock Return Data From The New York Stock Exchange, Jett Burns

Electronic Theses and Dissertations

Statistical inference is a tool for creating models that can accurately display real-world events. Special importance is given to the financial methods that model risk and large price movements. A parameter that describes tail heaviness, and risk overall, is α. This research finds a representative distribution that models α. The absolute value of standardized stock returns from the Center for Research on Security Prices are used in this research. The inference is performed using R. Approximations for α are found using the ptsuite package. The GAMLSS package employs maximum likelihood estimation to estimate distribution parameters using the CRSP data. The …

The Impact Of An Integrated Stem Collaborative Approach On Preservice Teachers’ Pedagogical Content Knowledge And Curricular Role Identity For Teaching Science, Qiuju Tian

Electronic Theses and Dissertations

The current study investigated the impact of an integrated STEM collaborative approach embedded in a science methods course on early childhood and elementary preservice teachers’ pedagogical content knowledge (PCK) and curricular role identity for teaching science, as well as the potential relationship between these two constructs. Participants were recruited from a group of preservice early childhood and elementary teacher candidates (N = 65) completing an undergraduate teacher education program at a university in the southeastern United States.

Using a mixed-methods design, the preservice teachers’ pedagogical content knowledge and curricular role identity were assessed using concept maps and a curricular …

Risk Gameplay Analysis Using Stochastic Beam Search, Jacob Gillenwater

Electronic Theses and Dissertations

Hasbro’s RISK, first published in 1959, is a complex multiplayer strategy game that has received little attention from the scientific community. Training artificial intelligence (AI) agents using stochastic beam search gives insight into effective strategy when playing RISK. A comprehensive analysis of the systems of play challenges preconceptions about good strategy in some areas of the game while reinforcing those preconceptions in others. This study applies stochastic beam search to discover optimal strategies in RISK. Results of the search show both support for and challenges to traditionally held positions about RISK gameplay. While stochastic beam search competently investigates gameplay on …

Home, Work, Land, Gregory Smith

Electronic Theses and Dissertations

The artist discusses his Master of Fine Arts exhibition, entitled Family, Work, Land. The exhibit was mounted in Tipton Gallery in downtown Johnson City, TN, from February 22nd to March 11th, 2022. A public reception was held on the evening of March 4th . The exhibition consisted principally of four multimedia installations. Smith’s body of work is an interpretation of how stories that he often heard growing up are related to the Western North Carolina community in which his grandparents were living in the first quarter of the twentieth century. These works explore the interactions between people, how they support …

Expression And Functional Characterization Of Avocado Dgat1 And Pdat1 In Arabidopsis And Camelina, Josphat Kiunga

Electronic Theses and Dissertations

The study is aimed to determine the role of avocado DGAT1 and PDAT1 in seed oil synthesis. Triacylglycerol (TAG) has a nutritional and industrial value and is essential for plant growth. DGAT1 and PDAT1 catalyze the final step of TAG Assembly. We hypothesized that both PaPDAT1 and PaDGAT1, although predominantly expressed in non-seed tissues, could contribute to oil accumulation in seeds. Agrobacterium transformants with PaPDAT1 and PaDGAT1 cloned in pCAMBIA were generated to test this. Subsequently, the Agrobacterium-mediated transformation of Arabidopsis mutant lines and camelina was carried out by floral dipping. The T₁ camelina seeds …

The Impact Of Mentoring In Closing The Achievement Gap For Black Male Students At A Predominantly White University In Tennessee, Patricia Waire Harlan

Electronic Theses and Dissertations

This phenomenological study addressed the factors of an institutionalized peer to peer mentoring program that fostered academic success and persistence among Black male students graduating from a predominantly White four-year public university in Tennessee through the lens of the critical race theory. Data was gathered through face-to-face, open-ended, semi-structured interviews via Zoom with twelve participants that graduated between 2014 and 2022. Study participants were grouped into group 1 as those Black male students that were not impacted by the global pandemic and group 2 as those Black male students that were impacted by the global pandemic. Emerging themes and categories …

Using Macroinvertebrates To Assess The Effects Of Nutrient Input Between The Nolichucky And Pigeon Rivers, Anna Grizzard

Electronic Theses and Dissertations

Previous work found significant differences in growth rates of native mussels at locations downstream from the regulated Walter’s Dam and the out-of-service, free-flowing Davy Crockett Dam. The purpose of this study is to investigate differences within the macroinvertebrate communities related to factors driving the differences in mussel growth between rivers. Macroinvertebrate samples were collected following the Tennessee Department of Environment and Conservation protocol for SQKICK collection and analyzed using the Tennessee Macroinvertebrate Index (TMI). There were no significant differences in TMI scores between the downstream sites of the rivers, but there were significant increases in chlorophyll_a, dissolved oxygen, …

Properties Of 25cr7ni Stainless Steel Fabricated Through Laser-Powder Bed Fusion., Arulselvan Arumugham Akilan

Electronic Theses and Dissertations

Stainless steel is a low carbon high alloyed system with higher concentrations of Cr& Ni, which impart high corrosion resistance to them. Alloys with approximately 25% Cr & 7% Ni in their chemical composition are commercially referred to as ‘Super Duplex Stainless Steel’. They have a unique phase composition of approximately 50% ferrite & 50% austenite, yielding a robust combination of high mechanical strength & corrosion resistance. They find extensive interest & application in the fields which demand a longer service life under intense mechanical / corrosive environment such as offshore oil rigs & pipelines in nuclear power plants. Traditional …

Functional Role Of Ppal And Potential For Moss In Industrial Applications., Susana Perez Martinez

Electronic Theses and Dissertations

This dissertation is an examination and characterization of the functional roles of PPAL. PROTEIN PRENYLTRANSFERASE ALPHA SUBUNIT-LIKE (PPAL) is a recently discovered gene. PPAL homologs are present in all plants and many animals, where its function is largely unknown. It is possible that PPAL could participate in prenylation processes since it shares similarity to the α subunits of known prenylation enzymes. Prenylation is a post-translational modification of proteins that involves the addition of a lipid moiety to proteins to facilitate membrane targeting and association and promote protein-protein interactions. Prenylation has important roles in plant growth and development, including …

Engineering Lewis Acidic Materials For Biomass Conversion And Battery Applications., Md Anwar Hossain

Electronic Theses and Dissertations

My long-term goal is to develop catalytic systems to produce renewable energy for a sustainable society. The overall research objective of my dissertation is to advance understanding of Lewis acidic materials for (1) conversion of renewable lignin into phenolics and (2) enhanced cycling stability of lithium metal batteries to safely store renewable electricity from wind and solar, thereby laying the groundwork for our transition to a sustainable society. Petroleum is a conventional feedstock for current transportation fuels (gasoline, diesel, and jet fuels). However, petroleum is a finite resource and produces greenhouse gases (CO₂ and CH₄) upon processing, …

Structural, Charge Transport, Gas Sensing, Magnetic, Pseudocapacitive, And Electrocatalytic Properties Of Perovskite Oxides., Surendra Bahadur Karki

Electronic Theses and Dissertations

Perovskites are functional materials with the general formula ABO₃ (A = alkali, alkaline earth or lanthanoid cations and B = transition metal or main group cations). These materials are marked by a variety of crystal structures and interesting properties such as colossal magnetoresistance, ferroelectricity, multiferroicity, superconductivity, pseudocapacitance, gas sensing, charge transport, and electrocatalytic properties. The formula of perovskite can be written as AA’BB’O₆, when there is ordering between two cations over A and B-sites. Such compounds are called double perovskite oxides. Some amount of oxygen could be lost from crystal structure without decomposition of the phase. Such …

New Accurate, Explainable, And Unbiased Machine Learning Models For Recommendation With Implicit Feedback., Khalil Damak

Electronic Theses and Dissertations

Recommender systems have become ubiquitous Artificial Intelligence (AI) tools that play an important role in filtering online information in our daily lives. Whether we are shopping, browsing movies, or listening to music online, AI recommender systems are working behind the scene to provide us with curated and personalized content, that has been predicted to be relevant to our interest. The increasing prevalence of recommender systems has challenged researchers to develop powerful algorithms that can deliver recommendations with increasing accuracy. In addition to the predictive accuracy of recommender systems, recent research has also started paying attention to their fairness, in particular …

The Last Straw For Mixed Ensemble And Electronis., Nicholas Hall

Electronic Theses and Dissertations

The Last Straw was composed for mixed ensemble and electronics. The main idea behind this piece is twofold: a) the treatment of the pitches, articulations, and dynamics shared between instruments and how they propagate out of phase closely resembles what I would have programed on various standalone synthesizer, and b) the processing itself is treated how I would manipulate various parameters on said synthesizers to achieve different sonic modulations. All instruments are amplified through a 4.1 sound system (4 loudspeakers and subwoofer) which is setup in a circle (see the performance layout page viii). Through processing via Max/MSP, the sound …

The Impact Of Intensive Advising Within Trio Student Support Services On Good Academic Standing And Student Perception: An Explorative Study, Mariesha Shaw

Electronic Theses and Dissertations

Challenges in bachelor’s degree attainment for disadvantaged students (e.g., low income, first generation and disabled) within higher education is a social problem. TRiO SSS, a federal program, has been implemented at a private university in Texas to meet the needs of disadvantaged students and positively influence good academic standing, which would lead to higher bachelor’s degree attainment. Intensive advising, which is holistic meetings conducted with participants to meet academic and personal needs, is one intervention utilized in the TRiO SSS program. The purpose of this study is to assess the role and influence of intensive advising by examining whether it …